I will be honest, I have no real problems with this. Then again I enjoyed some of the concepts for advertising shown in Minority Report which did feature ads which could identify you.

the idea of collecting who looked at your display is invaluable. It would be beneficial for both government and ad agency. Ad agency is obvious but government could learn if displays present information people want and it was presented in a manner to catch their attention. The negative aspects of government use could be limited through privacy laws and such.